The McLaren X-1 one-off was seen last weekend at the Formula 1 Bahrain Grand Prix.

As you might remember, this truly unique X-1 was developed by McLaren Special Operations (MSO) and is based on the MP4-12C. The vehicle tips the scales at around 3,086 lbs (1,400 kg) and "shares the same major mechanical components as the 12C, including the twin-turbo 616 bhp (460 kW) engine."

It was conceived for a wealthy client who already owned a McLaren F1, an MP4-12C and a Mercedes-Benz SLR. The client wanted MSO to implement styling cues from a 1953 Chrysler D'Elegance Ghia, 1961 Facel Vega, 1939 Mercedes-Benz 540K, 1959 Buick Electra and a 1971 Citroën SM, mixed with a grand piano, Airstream trailer, Jaeger-LeCoultre clock, Thomas Mann Montblanc pen and an eggplant - resulting in something that only Batman would drive.